Hi,
I got the syntax.
.include "filename".
Thanks for your help.
Thanks,
Prashanthi
--- "Gudjon I. Gudjonsson" <[EMAIL PROTECTED]> wrote:
> Hi
> I made the following c-code:
>
> // Initialize Module 0 in capture mode
> CCAPM0=0x21; // Capture positive edge first
> // for measuring pulse width
> flag_0=0;
> n=1;
> AUXR1=0x01;
> meas_end=res_dph_addr[n];
> _asm
> mov dph, _meas_end
> mov dpl, #0
> _endasm;
> AUXR1=0;
> meas_end=res_dph_addr[n+1];
>
> and in the assembler code it looks like this:
>
> mov _CCAPM0,#0x21
> ; measure_pulses_03.c:116: flag_0=0;
> clr _flag_0
> ; measure_pulses_03.c:118: AUXR1=0x01;
> mov _AUXR1,#0x01
> ; measure_pulses_03.c:119: meas_end=res_dph_addr[n];
> ; measure_pulses_03.c:123: _endasm;
>
> mov dph, #_meas_end
> mov dpl, #0
>
> ; measure_pulses_03.c:124: AUXR1=0;
> mov _AUXR1,#0x00
> ; measure_pulses_03.c:125:
> meas_end=res_dph_addr[n+1];
> mov dptr,#(_res_dph_addr + 0x0002)
> clr a
> movc a,@a+dptr
> mov _meas_end,a
>
> The variable meas_end is not set until after the
> _asm block but I need it
> before the block. The obvious solution is to set DPL
> and DPH in C :)
> But I might need to do use inline assembler some
> other time and I don't want
> my variables to be optimised away.
> Can anyone explain this behaviour?
>
> The other question
>
> I have spent the last two days on making a function
> that enables interrupts
> from PCA to make measurements. It should then wait
> for a keyboard input to
> finish the measurement.
> EC = 1;
> EA = 1; // Enable global interrupt
> CR = 1;
> ggetchar();
> CR = 0; // Turn PCA timer off
> IE = 0x0; // Disable all interrupt
> where the functions are defined below. The problem
> is that the program always
> jumps over the ggetchar() function without waiting
> and even if I only put a
> while(1) statement instead of the ggetchar()
> function.
> I guess this means tedious debugging but if it is
> some simple misunderstanding
> I would be very happy :)
>
> unsigned char ggetchar()
> {
> while(P2==0xFF);
> usleep(30000);
> return P2;
> }
>
>
> void usleep(unsigned int j)
> {
> unsigned int i;
> for ( i=0;i<=j;i++);
> }
>
> Thanks
> Gudjon
>
>
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